Improvement in forming blocks for pavements



GEORGE L. EAGAN, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN FORMING BLOCKS FOR PAVEME NTS.

Specification forming part of Letters Patent No. 125,798, dated April16, 1872.

To all whom it may concern:

Be it known that I, GEORGE L. EAGAN, of San Francisco, in the county ofSan Francisco and State of California, have invented a new and ImprovedMethod or Process for Manufacturing Concrete Paving-Blocks; and I dohereby declare the following to be a full, clear, and exact descriptionof the same.

The blocks or tiles to be used for laying all kinds of pavements, andfor any other structure where it may be desirable to use such material,are prepared in the following manner: First, I provide myself withsuitable molds, which will mold stones, blocks,-or-tiles about twelveinches long, three inches wide on .top, and four inches wide on thebottom, the

bevel or incline of the side of the block extending the whole height ofthe block or only from the top down to nearly the middle of the side.These molds I fill with broken stone, brick, or other similar material,and I then pour upon the mass a quantity of melted asphalt or otherbituminous matter sufficient to run in among the broken pieces and fillall the interstices between the same, said melted asphalt beingthickened by any suitable material, if preferred. Having done this, Iallow the whole to set and harden into a compact homogeneous block ofbroken stone bound together by the hardened asphalt; and when it issufiiciently hardened to be easily handled I remove it from the moldsand repeat the process to form a new lot. ment of this material I placethe blocks together so that they will form regular rows across thestreet, with recesses between the upper edges of adjacent rows. 1 thenfill in these angular recesses with melted asphalt, or asphalt andgravel or broken stones, which, when hardened, become homogeneous withthe rest of the pavement.

I do not claim to be the first to use broken stone and asphalt inlayingpavements, nor to be the first to mold concrete into suitableblocks, 850.; but

What I do claim is The process of preparing pavingblocks by fillingmolds with broken pieces of stone, &c., pouring melted bituminous matterupon the stone in the molds so that it will percolate In laying a pave-

